Unification of the Grid and the Web

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Unification of the Grid and the Web

• B. Ramamurthy

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Review

• Fundamental components of a distributed systems
• System model
• Architectural / organizational model
• Internetworking
• Request-response model
• Web services
• Globus grid services

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Project 1

• RMI and tightly coupled Java-based distributed
  system
• Streaming and parsing XML data
• Relational data model and Oracle 9i based
  database
• Loosely coupled systems
• Web services simple request response

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?Project 2

• Organization offer their service through
  publication as wsdl and through XML feeds.
• Mash up of services is an alternative to
  traditional data integration.
• On the fly and on demand integration
• It is very good for highly dynamic systems
• You are required use a combination of amazon.com
  other web service xml feeds
• However there are issues with mash ups

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?Project 3

• Mash up is simply combining data from multiple
  sources, usually obtained through published web
  services
• Performance
• Robustness
• Reliability
• Caching, precalculation
• Concurrency (multi-threading, EJB)
• Scalability
• Data access

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For Project 2 Items needed 3/21 midnight online
submission

• File name YourName_P2S2.pdf
• Project title affiliation etc. as in project
  report
• Update project summary (topic can be changed from
  furniture store)
• Any creative topic or a creative twist to
  furniture gets 10 points
• System model (picture) with proper titles and
  annotations approx. 1 page
• Architectural model (picture) with proper titles
  and annotations approx. 1 page
• Technologies involved and how they are used
  approx 0.5 page
• Project 2 implementation details 0.5 page
• Working implementation due 3/31

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Quiz 1

• Topics discussed in class
• Chapters 1-5
• Chapter 19 focus on web services
• Project 1 RMI, JDBC/ODBC, WS
• Grid services as in Chapter 19
• Todays discussion
• Format short answer questions answer in the
  space allocated.

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Continuing on Grid ? Web Services

• Globus Toolkit 3.x GT3 OGSA and OGSI
• OGSA open grids services architecture (read
  19.7.3)
• OGSI open grid services infrastructure
  (interfaces/API)
• Globus Toolkit 4.x GT4 OGSA WSRF
• WSRF Web Services Resources Framework
• WSDM Web Services Distributed Management

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Grid services

• Are web services that implement standard
  interfaces in-addition to application-specific
  interfaces.
• Interface to set of data for meta data
  (WS-Resource) state concept
• Context in which service must provide a factory
  with ability to create new service instances and
  control their life-cycle
• Standardized fault model notification services
  service groups
• Infrastructure provides directory service,
  management service, security services
• Lets look at an example Fusion Grid